Primary 4 Basic Science and Technology Flashcards: Developmental Changes in Plants and Their Causes

Question 1

What is growth in a plant?

Accepted Answer

an increase in its size and number of parts

Question 2

What is plant development?

Accepted Answer

changes in form and function during its life cycle

Question 3

The first stage of a flowering plant usually begins with a ____.

Accepted Answer

seed

Question 4

The opening of a seed and emergence of a young plant is called ____.

Accepted Answer

germination

Question 5

Which plant part usually grows downward into the soil first?

Accepted Answer

the root

Question 6

A young plant that has just grown from a seed is called a ____.

Accepted Answer

seedling

Question 7

Which change shows growth: becoming taller, changing colour, drying up, or shedding leaves?

Accepted Answer

becoming taller

Question 8

Flowers may develop into ____ after pollination.

Accepted Answer

fruits

Question 9

The main reason a green plant needs sunlight is to ____.

Accepted Answer

make food

Question 10

What may happen to a plant that receives too little water?

Accepted Answer

it may wilt

Question 11

Why does a plant need minerals from the soil?

Accepted Answer

for healthy growth

Question 12

Leaves turning yellow may show that the plant ____.

Accepted Answer

lacks nutrients or is unhealthy

Question 13

Which factor is NOT needed for healthy plant growth: water, air, light, or smoke?

Accepted Answer

smoke

Question 14

A plant stem bending toward a window is responding to ____.

Accepted Answer

light

Question 15

The correct way to study plant growth over time is to ____.

Accepted Answer

observe and record changes regularly

Question 16

What tool can be used to measure a plant’s increase in height?

Accepted Answer

a ruler

Question 17

A table of dates and plant heights helps a pupil to ____.

Accepted Answer

compare growth over time

Question 18

Which is a developmental change: producing flowers, gaining 2 cm in height, receiving water, or being measured?

Accepted Answer

producing flowers

Question 19

Leaf fall in some plants can be caused by ____.

Accepted Answer

seasonal change

Question 20

What is the difference between growth and development in plants?

Accepted Answer

growth increases size, while development changes form or function

Strong work.